摘要:
A one-pot synthesis of beta-amino esters has been achieved in 59-75% yield from aromatic and aliphatic nitrites via the condensation of the corresponding non-enolizable and enolizable aldimine-triethylborane complexes, respectively with methyl trimethylsilyl ketene acetals. Grignard-mediated lactamization of the intermediate beta-amino esters provides the corresponding beta-lactams in the same pot in 58-74% overall yield.